]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* Driver for SanDisk SDDR-55 SmartMedia reader |
2 | * | |
3 | * $Id:$ | |
4 | * | |
5 | * SDDR55 driver v0.1: | |
6 | * | |
7 | * First release | |
8 | * | |
9 | * Current development and maintenance by: | |
10 | * (c) 2002 Simon Munton | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2, or (at your option) any | |
15 | * later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License along | |
23 | * with this program; if not, write to the Free Software Foundation, Inc., | |
24 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | */ | |
26 | ||
27 | #include <linux/jiffies.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/slab.h> | |
30 | ||
31 | #include <scsi/scsi.h> | |
32 | #include <scsi/scsi_cmnd.h> | |
33 | ||
34 | #include "usb.h" | |
35 | #include "transport.h" | |
36 | #include "protocol.h" | |
37 | #include "debug.h" | |
38 | #include "sddr55.h" | |
39 | ||
40 | ||
41 | #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) ) | |
42 | #define LSB_of(s) ((s)&0xFF) | |
43 | #define MSB_of(s) ((s)>>8) | |
44 | #define PAGESIZE 512 | |
45 | ||
46 | #define set_sense_info(sk, asc, ascq) \ | |
47 | do { \ | |
48 | info->sense_data[2] = sk; \ | |
49 | info->sense_data[12] = asc; \ | |
50 | info->sense_data[13] = ascq; \ | |
51 | } while (0) | |
52 | ||
53 | ||
54 | struct sddr55_card_info { | |
55 | unsigned long capacity; /* Size of card in bytes */ | |
56 | int max_log_blks; /* maximum number of logical blocks */ | |
57 | int pageshift; /* log2 of pagesize */ | |
58 | int smallpageshift; /* 1 if pagesize == 256 */ | |
59 | int blocksize; /* Size of block in pages */ | |
60 | int blockshift; /* log2 of blocksize */ | |
61 | int blockmask; /* 2^blockshift - 1 */ | |
62 | int read_only; /* non zero if card is write protected */ | |
63 | int force_read_only; /* non zero if we find a map error*/ | |
64 | int *lba_to_pba; /* logical to physical map */ | |
65 | int *pba_to_lba; /* physical to logical map */ | |
66 | int fatal_error; /* set if we detect something nasty */ | |
67 | unsigned long last_access; /* number of jiffies since we last talked to device */ | |
68 | unsigned char sense_data[18]; | |
69 | }; | |
70 | ||
71 | ||
72 | #define NOT_ALLOCATED 0xffffffff | |
73 | #define BAD_BLOCK 0xffff | |
74 | #define CIS_BLOCK 0x400 | |
75 | #define UNUSED_BLOCK 0x3ff | |
76 | ||
77 | static int | |
78 | sddr55_bulk_transport(struct us_data *us, int direction, | |
79 | unsigned char *data, unsigned int len) { | |
80 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; | |
81 | unsigned int pipe = (direction == DMA_FROM_DEVICE) ? | |
82 | us->recv_bulk_pipe : us->send_bulk_pipe; | |
83 | ||
84 | if (!len) | |
85 | return USB_STOR_XFER_GOOD; | |
86 | info->last_access = jiffies; | |
87 | return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL); | |
88 | } | |
89 | ||
90 | /* check if card inserted, if there is, update read_only status | |
91 | * return non zero if no card | |
92 | */ | |
93 | ||
94 | static int sddr55_status(struct us_data *us) | |
95 | { | |
96 | int result; | |
97 | unsigned char *command = us->iobuf; | |
98 | unsigned char *status = us->iobuf; | |
99 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; | |
100 | ||
101 | /* send command */ | |
102 | memset(command, 0, 8); | |
103 | command[5] = 0xB0; | |
104 | command[7] = 0x80; | |
105 | result = sddr55_bulk_transport(us, | |
106 | DMA_TO_DEVICE, command, 8); | |
107 | ||
108 | US_DEBUGP("Result for send_command in status %d\n", | |
109 | result); | |
110 | ||
111 | if (result != USB_STOR_XFER_GOOD) { | |
112 | set_sense_info (4, 0, 0); /* hardware error */ | |
113 | return USB_STOR_TRANSPORT_ERROR; | |
114 | } | |
115 | ||
116 | result = sddr55_bulk_transport(us, | |
117 | DMA_FROM_DEVICE, status, 4); | |
118 | ||
119 | /* expect to get short transfer if no card fitted */ | |
120 | if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) { | |
121 | /* had a short transfer, no card inserted, free map memory */ | |
122 | if (info->lba_to_pba) | |
123 | kfree(info->lba_to_pba); | |
124 | if (info->pba_to_lba) | |
125 | kfree(info->pba_to_lba); | |
126 | info->lba_to_pba = NULL; | |
127 | info->pba_to_lba = NULL; | |
128 | ||
129 | info->fatal_error = 0; | |
130 | info->force_read_only = 0; | |
131 | ||
132 | set_sense_info (2, 0x3a, 0); /* not ready, medium not present */ | |
133 | return USB_STOR_TRANSPORT_FAILED; | |
134 | } | |
135 | ||
136 | if (result != USB_STOR_XFER_GOOD) { | |
137 | set_sense_info (4, 0, 0); /* hardware error */ | |
138 | return USB_STOR_TRANSPORT_FAILED; | |
139 | } | |
140 | ||
141 | /* check write protect status */ | |
142 | info->read_only = (status[0] & 0x20); | |
143 | ||
144 | /* now read status */ | |
145 | result = sddr55_bulk_transport(us, | |
146 | DMA_FROM_DEVICE, status, 2); | |
147 | ||
148 | if (result != USB_STOR_XFER_GOOD) { | |
149 | set_sense_info (4, 0, 0); /* hardware error */ | |
150 | } | |
151 | ||
152 | return (result == USB_STOR_XFER_GOOD ? | |
153 | USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED); | |
154 | } | |
155 | ||
156 | ||
157 | static int sddr55_read_data(struct us_data *us, | |
158 | unsigned int lba, | |
159 | unsigned int page, | |
160 | unsigned short sectors) { | |
161 | ||
162 | int result = USB_STOR_TRANSPORT_GOOD; | |
163 | unsigned char *command = us->iobuf; | |
164 | unsigned char *status = us->iobuf; | |
165 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; | |
166 | unsigned char *buffer; | |
167 | ||
168 | unsigned int pba; | |
169 | unsigned long address; | |
170 | ||
171 | unsigned short pages; | |
172 | unsigned int len, index, offset; | |
173 | ||
174 | // Since we only read in one block at a time, we have to create | |
175 | // a bounce buffer and move the data a piece at a time between the | |
176 | // bounce buffer and the actual transfer buffer. | |
177 | ||
178 | len = min((unsigned int) sectors, (unsigned int) info->blocksize >> | |
179 | info->smallpageshift) * PAGESIZE; | |
180 | buffer = kmalloc(len, GFP_NOIO); | |
181 | if (buffer == NULL) | |
182 | return USB_STOR_TRANSPORT_ERROR; /* out of memory */ | |
183 | index = offset = 0; | |
184 | ||
185 | while (sectors>0) { | |
186 | ||
187 | /* have we got to end? */ | |
188 | if (lba >= info->max_log_blks) | |
189 | break; | |
190 | ||
191 | pba = info->lba_to_pba[lba]; | |
192 | ||
193 | // Read as many sectors as possible in this block | |
194 | ||
195 | pages = min((unsigned int) sectors << info->smallpageshift, | |
196 | info->blocksize - page); | |
197 | len = pages << info->pageshift; | |
198 | ||
199 | US_DEBUGP("Read %02X pages, from PBA %04X" | |
200 | " (LBA %04X) page %02X\n", | |
201 | pages, pba, lba, page); | |
202 | ||
203 | if (pba == NOT_ALLOCATED) { | |
204 | /* no pba for this lba, fill with zeroes */ | |
205 | memset (buffer, 0, len); | |
206 | } else { | |
207 | ||
208 | address = (pba << info->blockshift) + page; | |
209 | ||
210 | command[0] = 0; | |
211 | command[1] = LSB_of(address>>16); | |
212 | command[2] = LSB_of(address>>8); | |
213 | command[3] = LSB_of(address); | |
214 | ||
215 | command[4] = 0; | |
216 | command[5] = 0xB0; | |
217 | command[6] = LSB_of(pages << (1 - info->smallpageshift)); | |
218 | command[7] = 0x85; | |
219 | ||
220 | /* send command */ | |
221 | result = sddr55_bulk_transport(us, | |
222 | DMA_TO_DEVICE, command, 8); | |
223 | ||
224 | US_DEBUGP("Result for send_command in read_data %d\n", | |
225 | result); | |
226 | ||
227 | if (result != USB_STOR_XFER_GOOD) { | |
228 | result = USB_STOR_TRANSPORT_ERROR; | |
229 | goto leave; | |
230 | } | |
231 | ||
232 | /* read data */ | |
233 | result = sddr55_bulk_transport(us, | |
234 | DMA_FROM_DEVICE, buffer, len); | |
235 | ||
236 | if (result != USB_STOR_XFER_GOOD) { | |
237 | result = USB_STOR_TRANSPORT_ERROR; | |
238 | goto leave; | |
239 | } | |
240 | ||
241 | /* now read status */ | |
242 | result = sddr55_bulk_transport(us, | |
243 | DMA_FROM_DEVICE, status, 2); | |
244 | ||
245 | if (result != USB_STOR_XFER_GOOD) { | |
246 | result = USB_STOR_TRANSPORT_ERROR; | |
247 | goto leave; | |
248 | } | |
249 | ||
250 | /* check status for error */ | |
251 | if (status[0] == 0xff && status[1] == 0x4) { | |
252 | set_sense_info (3, 0x11, 0); | |
253 | result = USB_STOR_TRANSPORT_FAILED; | |
254 | goto leave; | |
255 | } | |
256 | } | |
257 | ||
258 | // Store the data in the transfer buffer | |
259 | usb_stor_access_xfer_buf(buffer, len, us->srb, | |
260 | &index, &offset, TO_XFER_BUF); | |
261 | ||
262 | page = 0; | |
263 | lba++; | |
264 | sectors -= pages >> info->smallpageshift; | |
265 | } | |
266 | ||
267 | result = USB_STOR_TRANSPORT_GOOD; | |
268 | ||
269 | leave: | |
270 | kfree(buffer); | |
271 | ||
272 | return result; | |
273 | } | |
274 | ||
275 | static int sddr55_write_data(struct us_data *us, | |
276 | unsigned int lba, | |
277 | unsigned int page, | |
278 | unsigned short sectors) { | |
279 | ||
280 | int result = USB_STOR_TRANSPORT_GOOD; | |
281 | unsigned char *command = us->iobuf; | |
282 | unsigned char *status = us->iobuf; | |
283 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; | |
284 | unsigned char *buffer; | |
285 | ||
286 | unsigned int pba; | |
287 | unsigned int new_pba; | |
288 | unsigned long address; | |
289 | ||
290 | unsigned short pages; | |
291 | int i; | |
292 | unsigned int len, index, offset; | |
293 | ||
294 | /* check if we are allowed to write */ | |
295 | if (info->read_only || info->force_read_only) { | |
296 | set_sense_info (7, 0x27, 0); /* read only */ | |
297 | return USB_STOR_TRANSPORT_FAILED; | |
298 | } | |
299 | ||
300 | // Since we only write one block at a time, we have to create | |
301 | // a bounce buffer and move the data a piece at a time between the | |
302 | // bounce buffer and the actual transfer buffer. | |
303 | ||
304 | len = min((unsigned int) sectors, (unsigned int) info->blocksize >> | |
305 | info->smallpageshift) * PAGESIZE; | |
306 | buffer = kmalloc(len, GFP_NOIO); | |
307 | if (buffer == NULL) | |
308 | return USB_STOR_TRANSPORT_ERROR; | |
309 | index = offset = 0; | |
310 | ||
311 | while (sectors > 0) { | |
312 | ||
313 | /* have we got to end? */ | |
314 | if (lba >= info->max_log_blks) | |
315 | break; | |
316 | ||
317 | pba = info->lba_to_pba[lba]; | |
318 | ||
319 | // Write as many sectors as possible in this block | |
320 | ||
321 | pages = min((unsigned int) sectors << info->smallpageshift, | |
322 | info->blocksize - page); | |
323 | len = pages << info->pageshift; | |
324 | ||
325 | // Get the data from the transfer buffer | |
326 | usb_stor_access_xfer_buf(buffer, len, us->srb, | |
327 | &index, &offset, FROM_XFER_BUF); | |
328 | ||
329 | US_DEBUGP("Write %02X pages, to PBA %04X" | |
330 | " (LBA %04X) page %02X\n", | |
331 | pages, pba, lba, page); | |
332 | ||
333 | command[4] = 0; | |
334 | ||
335 | if (pba == NOT_ALLOCATED) { | |
336 | /* no pba allocated for this lba, find a free pba to use */ | |
337 | ||
338 | int max_pba = (info->max_log_blks / 250 ) * 256; | |
339 | int found_count = 0; | |
340 | int found_pba = -1; | |
341 | ||
342 | /* set pba to first block in zone lba is in */ | |
343 | pba = (lba / 1000) * 1024; | |
344 | ||
345 | US_DEBUGP("No PBA for LBA %04X\n",lba); | |
346 | ||
347 | if (max_pba > 1024) | |
348 | max_pba = 1024; | |
349 | ||
350 | /* | |
351 | * Scan through the map looking for an unused block | |
352 | * leave 16 unused blocks at start (or as many as | |
353 | * possible) since the sddr55 seems to reuse a used | |
354 | * block when it shouldn't if we don't leave space. | |
355 | */ | |
356 | for (i = 0; i < max_pba; i++, pba++) { | |
357 | if (info->pba_to_lba[pba] == UNUSED_BLOCK) { | |
358 | found_pba = pba; | |
359 | if (found_count++ > 16) | |
360 | break; | |
361 | } | |
362 | } | |
363 | ||
364 | pba = found_pba; | |
365 | ||
366 | if (pba == -1) { | |
367 | /* oh dear */ | |
368 | US_DEBUGP("Couldn't find unallocated block\n"); | |
369 | ||
370 | set_sense_info (3, 0x31, 0); /* medium error */ | |
371 | result = USB_STOR_TRANSPORT_FAILED; | |
372 | goto leave; | |
373 | } | |
374 | ||
375 | US_DEBUGP("Allocating PBA %04X for LBA %04X\n", pba, lba); | |
376 | ||
377 | /* set writing to unallocated block flag */ | |
378 | command[4] = 0x40; | |
379 | } | |
380 | ||
381 | address = (pba << info->blockshift) + page; | |
382 | ||
383 | command[1] = LSB_of(address>>16); | |
384 | command[2] = LSB_of(address>>8); | |
385 | command[3] = LSB_of(address); | |
386 | ||
387 | /* set the lba into the command, modulo 1000 */ | |
388 | command[0] = LSB_of(lba % 1000); | |
389 | command[6] = MSB_of(lba % 1000); | |
390 | ||
391 | command[4] |= LSB_of(pages >> info->smallpageshift); | |
392 | command[5] = 0xB0; | |
393 | command[7] = 0x86; | |
394 | ||
395 | /* send command */ | |
396 | result = sddr55_bulk_transport(us, | |
397 | DMA_TO_DEVICE, command, 8); | |
398 | ||
399 | if (result != USB_STOR_XFER_GOOD) { | |
400 | US_DEBUGP("Result for send_command in write_data %d\n", | |
401 | result); | |
402 | ||
403 | /* set_sense_info is superfluous here? */ | |
404 | set_sense_info (3, 0x3, 0);/* peripheral write error */ | |
405 | result = USB_STOR_TRANSPORT_FAILED; | |
406 | goto leave; | |
407 | } | |
408 | ||
409 | /* send the data */ | |
410 | result = sddr55_bulk_transport(us, | |
411 | DMA_TO_DEVICE, buffer, len); | |
412 | ||
413 | if (result != USB_STOR_XFER_GOOD) { | |
414 | US_DEBUGP("Result for send_data in write_data %d\n", | |
415 | result); | |
416 | ||
417 | /* set_sense_info is superfluous here? */ | |
418 | set_sense_info (3, 0x3, 0);/* peripheral write error */ | |
419 | result = USB_STOR_TRANSPORT_FAILED; | |
420 | goto leave; | |
421 | } | |
422 | ||
423 | /* now read status */ | |
424 | result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6); | |
425 | ||
426 | if (result != USB_STOR_XFER_GOOD) { | |
427 | US_DEBUGP("Result for get_status in write_data %d\n", | |
428 | result); | |
429 | ||
430 | /* set_sense_info is superfluous here? */ | |
431 | set_sense_info (3, 0x3, 0);/* peripheral write error */ | |
432 | result = USB_STOR_TRANSPORT_FAILED; | |
433 | goto leave; | |
434 | } | |
435 | ||
436 | new_pba = (status[3] + (status[4] << 8) + (status[5] << 16)) | |
437 | >> info->blockshift; | |
438 | ||
439 | /* check status for error */ | |
440 | if (status[0] == 0xff && status[1] == 0x4) { | |
441 | info->pba_to_lba[new_pba] = BAD_BLOCK; | |
442 | ||
443 | set_sense_info (3, 0x0c, 0); | |
444 | result = USB_STOR_TRANSPORT_FAILED; | |
445 | goto leave; | |
446 | } | |
447 | ||
448 | US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n", | |
449 | lba, pba, new_pba); | |
450 | ||
451 | /* update the lba<->pba maps, note new_pba might be the same as pba */ | |
452 | info->lba_to_pba[lba] = new_pba; | |
453 | info->pba_to_lba[pba] = UNUSED_BLOCK; | |
454 | ||
455 | /* check that new_pba wasn't already being used */ | |
456 | if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) { | |
457 | printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n", | |
458 | new_pba, info->pba_to_lba[new_pba]); | |
459 | info->fatal_error = 1; | |
460 | set_sense_info (3, 0x31, 0); | |
461 | result = USB_STOR_TRANSPORT_FAILED; | |
462 | goto leave; | |
463 | } | |
464 | ||
465 | /* update the pba<->lba maps for new_pba */ | |
466 | info->pba_to_lba[new_pba] = lba % 1000; | |
467 | ||
468 | page = 0; | |
469 | lba++; | |
470 | sectors -= pages >> info->smallpageshift; | |
471 | } | |
472 | result = USB_STOR_TRANSPORT_GOOD; | |
473 | ||
474 | leave: | |
475 | kfree(buffer); | |
476 | return result; | |
477 | } | |
478 | ||
479 | static int sddr55_read_deviceID(struct us_data *us, | |
480 | unsigned char *manufacturerID, | |
481 | unsigned char *deviceID) { | |
482 | ||
483 | int result; | |
484 | unsigned char *command = us->iobuf; | |
485 | unsigned char *content = us->iobuf; | |
486 | ||
487 | memset(command, 0, 8); | |
488 | command[5] = 0xB0; | |
489 | command[7] = 0x84; | |
490 | result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); | |
491 | ||
492 | US_DEBUGP("Result of send_control for device ID is %d\n", | |
493 | result); | |
494 | ||
495 | if (result != USB_STOR_XFER_GOOD) | |
496 | return USB_STOR_TRANSPORT_ERROR; | |
497 | ||
498 | result = sddr55_bulk_transport(us, | |
499 | DMA_FROM_DEVICE, content, 4); | |
500 | ||
501 | if (result != USB_STOR_XFER_GOOD) | |
502 | return USB_STOR_TRANSPORT_ERROR; | |
503 | ||
504 | *manufacturerID = content[0]; | |
505 | *deviceID = content[1]; | |
506 | ||
507 | if (content[0] != 0xff) { | |
508 | result = sddr55_bulk_transport(us, | |
509 | DMA_FROM_DEVICE, content, 2); | |
510 | } | |
511 | ||
512 | return USB_STOR_TRANSPORT_GOOD; | |
513 | } | |
514 | ||
515 | ||
516 | int sddr55_reset(struct us_data *us) { | |
517 | return 0; | |
518 | } | |
519 | ||
520 | ||
521 | static unsigned long sddr55_get_capacity(struct us_data *us) { | |
522 | ||
523 | unsigned char manufacturerID; | |
524 | unsigned char deviceID; | |
525 | int result; | |
526 | struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra; | |
527 | ||
528 | US_DEBUGP("Reading capacity...\n"); | |
529 | ||
530 | result = sddr55_read_deviceID(us, | |
531 | &manufacturerID, | |
532 | &deviceID); | |
533 | ||
534 | US_DEBUGP("Result of read_deviceID is %d\n", | |
535 | result); | |
536 | ||
537 | if (result != USB_STOR_XFER_GOOD) | |
538 | return 0; | |
539 | ||
540 | US_DEBUGP("Device ID = %02X\n", deviceID); | |
541 | US_DEBUGP("Manuf ID = %02X\n", manufacturerID); | |
542 | ||
543 | info->pageshift = 9; | |
544 | info->smallpageshift = 0; | |
545 | info->blocksize = 16; | |
546 | info->blockshift = 4; | |
547 | info->blockmask = 15; | |
548 | ||
549 | switch (deviceID) { | |
550 | ||
551 | case 0x6e: // 1MB | |
552 | case 0xe8: | |
553 | case 0xec: | |
554 | info->pageshift = 8; | |
555 | info->smallpageshift = 1; | |
556 | return 0x00100000; | |
557 | ||
558 | case 0xea: // 2MB | |
559 | case 0x64: | |
560 | info->pageshift = 8; | |
561 | info->smallpageshift = 1; | |
562 | case 0x5d: // 5d is a ROM card with pagesize 512. | |
563 | return 0x00200000; | |
564 | ||
565 | case 0xe3: // 4MB | |
566 | case 0xe5: | |
567 | case 0x6b: | |
568 | case 0xd5: | |
569 | return 0x00400000; | |
570 | ||
571 | case 0xe6: // 8MB | |
572 | case 0xd6: | |
573 | return 0x00800000; | |
574 | ||
575 | case 0x73: // 16MB | |
576 | info->blocksize = 32; | |
577 | info->blockshift = 5; | |
578 | info->blockmask = 31; | |
579 | return 0x01000000; | |
580 | ||
581 | case 0x75: // 32MB | |
582 | info->blocksize = 32; | |
583 | info->blockshift = 5; | |
584 | info->blockmask = 31; | |
585 | return 0x02000000; | |
586 | ||
587 | case 0x76: // 64MB | |
588 | info->blocksize = 32; | |
589 | info->blockshift = 5; | |
590 | info->blockmask = 31; | |
591 | return 0x04000000; | |
592 | ||
593 | case 0x79: // 128MB | |
594 | info->blocksize = 32; | |
595 | info->blockshift = 5; | |
596 | info->blockmask = 31; | |
597 | return 0x08000000; | |
598 | ||
599 | default: // unknown | |
600 | return 0; | |
601 | ||
602 | } | |
603 | } | |
604 | ||
605 | static int sddr55_read_map(struct us_data *us) { | |
606 | ||
607 | struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra); | |
608 | int numblocks; | |
609 | unsigned char *buffer; | |
610 | unsigned char *command = us->iobuf; | |
611 | int i; | |
612 | unsigned short lba; | |
613 | unsigned short max_lba; | |
614 | int result; | |
615 | ||
616 | if (!info->capacity) | |
617 | return -1; | |
618 | ||
619 | numblocks = info->capacity >> (info->blockshift + info->pageshift); | |
620 | ||
621 | buffer = kmalloc( numblocks * 2, GFP_NOIO ); | |
622 | ||
623 | if (!buffer) | |
624 | return -1; | |
625 | ||
626 | memset(command, 0, 8); | |
627 | command[5] = 0xB0; | |
628 | command[6] = numblocks * 2 / 256; | |
629 | command[7] = 0x8A; | |
630 | ||
631 | result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8); | |
632 | ||
633 | if ( result != USB_STOR_XFER_GOOD) { | |
634 | kfree (buffer); | |
635 | return -1; | |
636 | } | |
637 | ||
638 | result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2); | |
639 | ||
640 | if ( result != USB_STOR_XFER_GOOD) { | |
641 | kfree (buffer); | |
642 | return -1; | |
643 | } | |
644 | ||
645 | result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2); | |
646 | ||
647 | if ( result != USB_STOR_XFER_GOOD) { | |
648 | kfree (buffer); | |
649 | return -1; | |
650 | } | |
651 | ||
652 | if (info->lba_to_pba) | |
653 | kfree(info->lba_to_pba); | |
654 | if (info->pba_to_lba) | |
655 | kfree(info->pba_to_lba); | |
656 | info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO); | |
657 | info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO); | |
658 | ||
659 | if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) { | |
660 | if (info->lba_to_pba != NULL) | |
661 | kfree(info->lba_to_pba); | |
662 | if (info->pba_to_lba != NULL) | |
663 | kfree(info->pba_to_lba); | |
664 | info->lba_to_pba = NULL; | |
665 | info->pba_to_lba = NULL; | |
666 | kfree(buffer); | |
667 | return -1; | |
668 | } | |
669 | ||
670 | memset(info->lba_to_pba, 0xff, numblocks*sizeof(int)); | |
671 | memset(info->pba_to_lba, 0xff, numblocks*sizeof(int)); | |
672 | ||
673 | /* set maximum lba */ | |
674 | max_lba = info->max_log_blks; | |
675 | if (max_lba > 1000) | |
676 | max_lba = 1000; | |
677 | ||
678 | // Each block is 64 bytes of control data, so block i is located in | |
679 | // scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11) | |
680 | ||
681 | for (i=0; i<numblocks; i++) { | |
682 | int zone = i / 1024; | |
683 | ||
684 | lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]); | |
685 | ||
686 | /* Every 1024 physical blocks ("zone"), the LBA numbers | |
687 | * go back to zero, but are within a higher | |
688 | * block of LBA's. Also, there is a maximum of | |
689 | * 1000 LBA's per zone. In other words, in PBA | |
690 | * 1024-2047 you will find LBA 0-999 which are | |
691 | * really LBA 1000-1999. Yes, this wastes 24 | |
692 | * physical blocks per zone. Go figure. | |
693 | * These devices can have blocks go bad, so there | |
694 | * are 24 spare blocks to use when blocks do go bad. | |
695 | */ | |
696 | ||
697 | /* SDDR55 returns 0xffff for a bad block, and 0x400 for the | |
698 | * CIS block. (Is this true for cards 8MB or less??) | |
699 | * Record these in the physical to logical map | |
700 | */ | |
701 | ||
702 | info->pba_to_lba[i] = lba; | |
703 | ||
704 | if (lba >= max_lba) { | |
705 | continue; | |
706 | } | |
707 | ||
708 | if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED && | |
709 | !info->force_read_only) { | |
710 | printk("sddr55: map inconsistency at LBA %04X\n", lba + zone * 1000); | |
711 | info->force_read_only = 1; | |
712 | } | |
713 | ||
714 | if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF)) | |
715 | US_DEBUGP("LBA %04X <-> PBA %04X\n", lba, i); | |
716 | ||
717 | info->lba_to_pba[lba + zone * 1000] = i; | |
718 | } | |
719 | ||
720 | kfree(buffer); | |
721 | return 0; | |
722 | } | |
723 | ||
724 | ||
725 | static void sddr55_card_info_destructor(void *extra) { | |
726 | struct sddr55_card_info *info = (struct sddr55_card_info *)extra; | |
727 | ||
728 | if (!extra) | |
729 | return; | |
730 | ||
731 | if (info->lba_to_pba) | |
732 | kfree(info->lba_to_pba); | |
733 | if (info->pba_to_lba) | |
734 | kfree(info->pba_to_lba); | |
735 | } | |
736 | ||
737 | ||
738 | /* | |
739 | * Transport for the Sandisk SDDR-55 | |
740 | */ | |
741 | int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us) | |
742 | { | |
743 | int result; | |
744 | static unsigned char inquiry_response[8] = { | |
745 | 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00 | |
746 | }; | |
747 | // write-protected for now, no block descriptor support | |
748 | static unsigned char mode_page_01[20] = { | |
749 | 0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0, | |
750 | 0x01, 0x0A, | |
751 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 | |
752 | }; | |
753 | unsigned char *ptr = us->iobuf; | |
754 | unsigned long capacity; | |
755 | unsigned int lba; | |
756 | unsigned int pba; | |
757 | unsigned int page; | |
758 | unsigned short pages; | |
759 | struct sddr55_card_info *info; | |
760 | ||
761 | if (!us->extra) { | |
762 | us->extra = kmalloc( | |
763 | sizeof(struct sddr55_card_info), GFP_NOIO); | |
764 | if (!us->extra) | |
765 | return USB_STOR_TRANSPORT_ERROR; | |
766 | memset(us->extra, 0, sizeof(struct sddr55_card_info)); | |
767 | us->extra_destructor = sddr55_card_info_destructor; | |
768 | } | |
769 | ||
770 | info = (struct sddr55_card_info *)(us->extra); | |
771 | ||
772 | if (srb->cmnd[0] == REQUEST_SENSE) { | |
773 | US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], info->sense_data[13]); | |
774 | ||
775 | memcpy (ptr, info->sense_data, sizeof info->sense_data); | |
776 | ptr[0] = 0x70; | |
777 | ptr[7] = 11; | |
778 | usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb); | |
779 | memset (info->sense_data, 0, sizeof info->sense_data); | |
780 | ||
781 | return USB_STOR_TRANSPORT_GOOD; | |
782 | } | |
783 | ||
784 | memset (info->sense_data, 0, sizeof info->sense_data); | |
785 | ||
786 | /* Dummy up a response for INQUIRY since SDDR55 doesn't | |
787 | respond to INQUIRY commands */ | |
788 | ||
789 | if (srb->cmnd[0] == INQUIRY) { | |
790 | memcpy(ptr, inquiry_response, 8); | |
791 | fill_inquiry_response(us, ptr, 36); | |
792 | return USB_STOR_TRANSPORT_GOOD; | |
793 | } | |
794 | ||
795 | /* only check card status if the map isn't allocated, ie no card seen yet | |
796 | * or if it's been over half a second since we last accessed it | |
797 | */ | |
798 | if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) { | |
799 | ||
800 | /* check to see if a card is fitted */ | |
801 | result = sddr55_status (us); | |
802 | if (result) { | |
803 | result = sddr55_status (us); | |
804 | if (!result) { | |
805 | set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */ | |
806 | } | |
807 | return USB_STOR_TRANSPORT_FAILED; | |
808 | } | |
809 | } | |
810 | ||
811 | /* if we detected a problem with the map when writing, | |
812 | don't allow any more access */ | |
813 | if (info->fatal_error) { | |
814 | ||
815 | set_sense_info (3, 0x31, 0); | |
816 | return USB_STOR_TRANSPORT_FAILED; | |
817 | } | |
818 | ||
819 | if (srb->cmnd[0] == READ_CAPACITY) { | |
820 | ||
821 | capacity = sddr55_get_capacity(us); | |
822 | ||
823 | if (!capacity) { | |
824 | set_sense_info (3, 0x30, 0); /* incompatible medium */ | |
825 | return USB_STOR_TRANSPORT_FAILED; | |
826 | } | |
827 | ||
828 | info->capacity = capacity; | |
829 | ||
830 | /* figure out the maximum logical block number, allowing for | |
831 | * the fact that only 250 out of every 256 are used */ | |
832 | info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250; | |
833 | ||
834 | /* Last page in the card, adjust as we only use 250 out of | |
835 | * every 256 pages */ | |
836 | capacity = (capacity / 256) * 250; | |
837 | ||
838 | capacity /= PAGESIZE; | |
839 | capacity--; | |
840 | ||
841 | ((__be32 *) ptr)[0] = cpu_to_be32(capacity); | |
842 | ((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE); | |
843 | usb_stor_set_xfer_buf(ptr, 8, srb); | |
844 | ||
845 | sddr55_read_map(us); | |
846 | ||
847 | return USB_STOR_TRANSPORT_GOOD; | |
848 | } | |
849 | ||
850 | if (srb->cmnd[0] == MODE_SENSE_10) { | |
851 | ||
852 | memcpy(ptr, mode_page_01, sizeof mode_page_01); | |
853 | ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0; | |
854 | usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb); | |
855 | ||
856 | if ( (srb->cmnd[2] & 0x3F) == 0x01 ) { | |
857 | US_DEBUGP( | |
858 | "SDDR55: Dummy up request for mode page 1\n"); | |
859 | return USB_STOR_TRANSPORT_GOOD; | |
860 | ||
861 | } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) { | |
862 | US_DEBUGP( | |
863 | "SDDR55: Dummy up request for all mode pages\n"); | |
864 | return USB_STOR_TRANSPORT_GOOD; | |
865 | } | |
866 | ||
867 | set_sense_info (5, 0x24, 0); /* invalid field in command */ | |
868 | return USB_STOR_TRANSPORT_FAILED; | |
869 | } | |
870 | ||
871 | if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { | |
872 | ||
873 | US_DEBUGP( | |
874 | "SDDR55: %s medium removal. Not that I can do" | |
875 | " anything about it...\n", | |
876 | (srb->cmnd[4]&0x03) ? "Prevent" : "Allow"); | |
877 | ||
878 | return USB_STOR_TRANSPORT_GOOD; | |
879 | ||
880 | } | |
881 | ||
882 | if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) { | |
883 | ||
884 | page = short_pack(srb->cmnd[3], srb->cmnd[2]); | |
885 | page <<= 16; | |
886 | page |= short_pack(srb->cmnd[5], srb->cmnd[4]); | |
887 | pages = short_pack(srb->cmnd[8], srb->cmnd[7]); | |
888 | ||
889 | page <<= info->smallpageshift; | |
890 | ||
891 | // convert page to block and page-within-block | |
892 | ||
893 | lba = page >> info->blockshift; | |
894 | page = page & info->blockmask; | |
895 | ||
896 | // locate physical block corresponding to logical block | |
897 | ||
898 | if (lba >= info->max_log_blks) { | |
899 | ||
900 | US_DEBUGP("Error: Requested LBA %04X exceeds maximum " | |
901 | "block %04X\n", lba, info->max_log_blks-1); | |
902 | ||
903 | set_sense_info (5, 0x24, 0); /* invalid field in command */ | |
904 | ||
905 | return USB_STOR_TRANSPORT_FAILED; | |
906 | } | |
907 | ||
908 | pba = info->lba_to_pba[lba]; | |
909 | ||
910 | if (srb->cmnd[0] == WRITE_10) { | |
911 | US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X" | |
912 | " pages %d\n", | |
913 | pba, lba, page, pages); | |
914 | ||
915 | return sddr55_write_data(us, lba, page, pages); | |
916 | } else { | |
917 | US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X" | |
918 | " pages %d\n", | |
919 | pba, lba, page, pages); | |
920 | ||
921 | return sddr55_read_data(us, lba, page, pages); | |
922 | } | |
923 | } | |
924 | ||
925 | ||
926 | if (srb->cmnd[0] == TEST_UNIT_READY) { | |
927 | return USB_STOR_TRANSPORT_GOOD; | |
928 | } | |
929 | ||
930 | if (srb->cmnd[0] == START_STOP) { | |
931 | return USB_STOR_TRANSPORT_GOOD; | |
932 | } | |
933 | ||
934 | set_sense_info (5, 0x20, 0); /* illegal command */ | |
935 | ||
936 | return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer? | |
937 | } | |
938 |